/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshOverlay.h
Note that although this is a template, many of the functions are defined in the .cpp file. As a result you need to explicitly instantiate and export the instance of the template that you wish to use in the block at the top of DynamicMeshOverlay.cpp
template<typename RealType, int ElementSize> class TDynamicMeshOverlay
TDynamicVector<...
Elements
List of element values
FRefCountVector
ElementsRefCounts
Reference counts of element indices. Iterate over this to find out which elements are valid.
TDynamicVector<...
ElementTriangles
List of triangle element-index triplets [Elem0 Elem1 Elem2]
FDynamicMesh3&...
ParentMesh
The parent mesh this overlay belongs to
TDynamicVector<...
ParentVertices
List of parent vertex indices, one per element